EP1521065A1 - Procédé de mesure de niveau de remplissage d'un récipient et un dispositif de mesure correspondant - Google Patents

Procédé de mesure de niveau de remplissage d'un récipient et un dispositif de mesure correspondant Download PDF

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Publication number
EP1521065A1
EP1521065A1 EP04021138A EP04021138A EP1521065A1 EP 1521065 A1 EP1521065 A1 EP 1521065A1 EP 04021138 A EP04021138 A EP 04021138A EP 04021138 A EP04021138 A EP 04021138A EP 1521065 A1 EP1521065 A1 EP 1521065A1
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EP
European Patent Office
Prior art keywords
level
sensor elements
sensor
liquid level
measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04021138A
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German (de)
English (en)
Inventor
Werner Rossmann
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Volkswagen AG
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Volkswagen AG
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Publication date
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Publication of EP1521065A1 publication Critical patent/EP1521065A1/fr
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/266—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor

Definitions

  • the invention relates to a method for level detection in a container by means of a several sensor elements comprehensive level sensor and a corresponding level measurement system.
  • the invention relates in particular to the level detection by means of capacitive Level sensors in a fuel tank of a vehicle.
  • a level measuring system comprises Usually means for taking into account a filling height-filling volume characteristic, which an assignment of a fill level, i. a position of the swimmer, to one allow appropriate filling volume. Problems with these mechanical level measurement systems consist of e.g. in a low accuracy and wear of moving Share.
  • Electronic level sensors in particular capacitive level sensors, require no moving parts and thus avoid wear due to mechanical Stress. Also allows the use of capacitive level sensors in one Level measurement system high precision in determining the level, and thus one accurate level measurement.
  • the capacity of one by two Evaluated electrodes formed capacitor arrangement.
  • the electrodes are in such the container arranged that a space between the electrodes of the liquid is accessible.
  • the liquid e.g. the fuel has one relative dielectric constant, which is different from that of the gas volume above the Liquid level differs.
  • a pair of electrodes are completely self-contained Below the liquid level, a different capacity than a pair of electrodes that is completely above the liquid level. Are located the electrodes with one part above the liquid level and with another part Below the liquid level, the capacity takes an intermediate value.
  • the level of the container can be determined in principle by the capacity of a Pair of electrodes is evaluated, which is different from an upper filling limit of Container to a lower filling limit, or a bottom of the container extends.
  • capacitive level sensors have been developed, which have a Use variety of electrodes.
  • level sensor In such of several sensor elements constructed level sensor is typically used each individual sensor element of Detection of a certain filling height range.
  • each individual sensor element of Detection of a certain filling height range e.g. in a series of Capacitors arranged at different heights above the bottom of the container are, due to a typically comparatively large difference in the relative dielectric constant of gas and liquid can be determined quite reliably whether a capacitor completely above the liquid level or completely below the liquid level is located.
  • the capacitors can thus as a level switch can be used, wherein the filling height can be determined in stages. For a high accuracy The filling height determination is accordingly a high number of level switches required.
  • reference electrodes or reference capacitors it is possible to use reference electrodes or reference capacitors to enable a change in the relative dielectric constant depending on the height above the bottom of the container to capture, so this at a Evaluation of continuous changes in capacity can be considered.
  • use of reference electrodes or reference capacitors is additional Effort connected.
  • the method provides a detection of continuous changes in the position of the Liquid level within the detected by one of the sensor elements Filling height range.
  • a pair of adjacent sensors evaluated. This is preferably done for arranged along the filling distance pairs of Sensor elements in turn, by the one sensor element with a measurement signal is applied and the other sensor element with a phase-shifted Measuring signal is applied.
  • the level will depend on the phase shift of the resulting signals or a resulting sum signal determined. From this results is a problem that evaluating the phase shift for all pairs of Sensor elements along the filling takes place, but only in one of evaluated pairs the desired level information is obtained.
  • the inventive method is used to detect a level in a container with the aid of a level sensor comprising a multiplicity of sensor elements. each The sensor elements detects a certain Brownardn Scheme.
  • the inventive method provides that initially evaluated the sensor elements to determine the fill level range in which a liquid level is is located, i. a sensor element is detected that detects the filling height range, in which is the liquid level. Thereupon, a further evaluation of the the filling level area in which the liquid level is located, corresponding sensor element.
  • the level results from the position of the Sensor element and the position of the liquid level within the of the Sensor element detected Med Waitn Scheme.
  • the level sensor may be in particular act to a capacitive level sensor.
  • the first evaluation of the sensor elements preferably takes place separately in a specific one Order, i. the sensor elements are evaluated one after the other. That's it Particularly advantageous, sensor elements, which with high probability in the vicinity of the Liquid level lie, evaluate first, allowing a quick determination that sensor element which detects the Gu Brunswickn Scheme in which the Liquid level is located, can take place.
  • the first evaluation can be aborted after said sensor element is identified, thereby evaluating the total is shortened.
  • a further acceleration of the first evaluation can be achieved by starting with sensor elements which are near an initial level.
  • the initial level may be, for example, the last determined position of the Liquid level act.
  • the reference value can be chosen, for example, such that it is the at a completely below the liquid level sensor element measured value corresponds.
  • the difference value can be used to determine the position of the Liquid level within the detected by the sensor element Gu Eckn Switzerlands be determined. It is particularly advantageous to use the reference value by evaluating the to determine completely below the liquid level sensor elements. In this way, the level of the container can be independent of the specific Properties, e.g. a relative dielectric constant, the liquid in the container be recorded. For several completely below the liquid level Sensor elements can by evaluating several or all of these sensor elements of Reference value can be determined more accurately, e.g. by forming an average.
  • the stored value can be e.g. in that case used when the liquid level is in that of a lowermost Sensor element detected Med Waitn Siemens is located.
  • An inventive fill level measuring system comprises a plurality of sensor elements, of each of which covers a certain level of fill height, as well as a Evaluation device.
  • the evaluation device is designed such that First, a first evaluation of the sensor elements takes place to the Green Housen Siemens and to determine the corresponding sensor element, in which a liquid level located. Then in a further evaluation step the position of the Liquid level within the detected by the previously determined sensor element Determined filling height range, thereby determining the level of the container.
  • the invention offers the advantage of accurate detection of the level in a little effort. In particular, improved accuracy over one Achieved method in which the sensor elements used only as a level switch become.
  • an evaluation which is based on the relevant Concentrated sensor elements. This can be used in the evaluation of the sensor elements in Relative more time is spent on the relevant sensor elements, causing the Level detection is accelerated, or a more accurate evaluation, e.g. through longer Smoothing times, can be done.
  • Other benefits are detailed below Description of the invention with reference to preferred embodiments can be seen.
  • FIG. 1 shows schematically a fill level sensor with a multiplicity of sensor elements, which are arranged along a filling direction of the container, wherein the level sensor for performing a method according to an embodiment of the present invention Invention is suitable
  • Fig. 2 shows an enlarged arrangement of capacitive Sensprelementen, wherein the Arrangement for carrying out the method according to the embodiment of the present invention is suitable, and
  • Fig. 3 shows schematically a circuit arrangement for an evaluation electronics in one Level measuring system according to the embodiment of the present invention.
  • Fig. 1 is a level measuring system for detecting a level in a Container 5, e.g. the fuel tank of a vehicle, with a variety of Sensor elements 10 shown.
  • the sensor elements 10 are capacitive sensor elements 10 executed.
  • the sensor elements 10 are along a filling direction 1 of the container fifth arranged so that each of the sensor elements 10 a certain Green Loven Scheme detected.
  • the filling height direction 1 is the direction along which a liquid level 2 in the container moves when the container 5 is filled or emptied becomes.
  • the sensor elements 10 and the corresponding Art Godn Schemee are located each at a defined height above the bottom 5b of the container.
  • each Sensor element 10 is a value of a measured variable, which of an immersion depth of the Sensor element 10 in the liquid depends, by an evaluation device 16th evaluated.
  • this measure is a capacity.
  • the Capacities of the sensor elements 10 are determined by the evaluation device 16 evaluated.
  • Fig. 1 the special case is shown that in the container 5 within the liquid Layers have formed.
  • an upper group of the sensor elements 10 in a gas volume above the liquid level 2 and a lower group of Sensor elements 10 is located in the liquid.
  • a lowermost sensor element 10 is partly in an upper liquid layer and partly in a lower one Liquid layer.
  • the capacitances at the sensor elements 10 of the upper group are clearly different from the capacities that are given to the Sensor elements 10 of the lower group are measured.
  • One of the sensor elements 10 detects a Brown Oldn Scheme in which the liquid level 2 is located.
  • For this Sensor element is a value of the capacitance measured, which between the s.den Sensor elements 10 of the upper group measured values and to the Sensor elements 10 of the lower group measured values is settled.
  • Fig. 2 shows an enlarged View of an array of measuring electrodes 10a against a conductive surface 10b.
  • the measuring electrodes 10a together with the conductive surface 10b, constitute measuring capacitors 10 '.
  • measuring capacitors 10 ' are shown, of which one of the Measuring capacitors 10 'is completely below the liquid level 2, a more of the measuring capacitors 10 'is partially below the liquid level. 2 and still another of the measuring capacitors 10 'is completely above the Liquid level 2 is located in a gas volume.
  • measuring capacitors 10 'different capacities Due to different relative dielectric constants of the liquid and the gas volume are the same as above said measuring capacitors 10 'different capacities.
  • the former measuring capacitor 10 'in the liquid has a capacity larger is, as that of the other mentioned measuring capacitors 10 '.
  • the capacity of the partial located below the liquid level 2 measuring capacitor 10 ' has a value on, which is between the values of the other two mentioned measuring capacitors 10 '.
  • the Position of the liquid level 2 determined by first the sensor elements 10th be evaluated to the Guardn Scheme and the corresponding sensor element 10th to determine in which the liquid level 2 is located. For this purpose, only the above significant difference between sensor elements 10 of the upper group and Detected sensor elements 10 of the lower group. For this first evaluation is thus no high accuracy required.
  • the sensor elements 10 are evaluated one after another in a specific order.
  • the order of the evaluation is selected such that sensor elements 10, which themselves with high probability near the liquid level 2, evaluated first become. As soon as the sensor element 10, which detects that Green Eckn Scheme, in which the liquid level 2 is located, are in this first Evaluation step evaluates no further sensor elements 10, so that no time losses occur due to unnecessary evaluations.
  • the container 5 primarily a high level has, first to evaluate a top in the filling height direction 1 sensor element 10, thereupon a sensor element arranged underneath, etc.
  • the Container 5 primarily has a low level, be advantageous with the lowest Sensor element 10 to begin. It can also be beneficial with a medium Sensor element 10 to begin, then a below the middle sensor element 10th to evaluate located sensor element 10, then one above the middle Sensor element 10 located to evaluate sensor element 10, etc., so that from the center the container in both directions starting sensor elements 10 are evaluated. Furthermore, it can start with a near an initial level sensor element 10 become.
  • the initial level is the last detected position of the liquid level 2.
  • the reference value corresponds to the value of the capacity, which at a completely below the liquid level 2 sensor element 10 is measured.
  • the sensor elements located completely below the liquid level become 10 evaluated, and the reference value determined by averaging.
  • the averaging will be individual values of the capacity, which differ significantly from the majority of the values, not considered.
  • Such a deviating value can in particular be due to stratification within the liquid, as shown in Fig. 1, or by deposits on the bottom 5b of the container 5 come about.
  • the reference value is stored so that for the Case that in a subsequent measuring cycle the reference value is not measured can be determined, e.g. at a level in the region of the lowest sensor element 10, a previously stored reference value is available.
  • the most accurate determination of the reference value offers the advantage that not only the accuracy of level detection is increased, but also more information the reference value can be obtained. For example, in the way or Properties of the liquid are inferred. This can be especially true Fuel tanks in vehicles to be advantageous e.g. a water content in the fuel to be able to determine. Also, e.g. a fake refueling with diesel instead of Gasoline are detected and a corresponding warning.
  • the described method for level detection determined in principle first Filling height of the container. This level is in the evaluation or by another Processing of the filling level, taking into account geometric information regarding the Container 5 in the form of a filling height-filling volume characteristic in a level of the container 5 implemented.
  • the evaluation device 16 is such designed to continuously change the capacitance of the measuring capacitors 10 'can capture.
  • the measuring capacitors 10 'not only as Level switch are operated, but there is a continuous detection of Position of the liquid level 2 within that of the measuring capacitors 10 'detected Art Brunswickn Kunststoffe. This results in a comparable number of measuring capacitors 10 'allows a more accurate level detection.
  • a circuit arrangement is shown schematically, which in the level measuring system is used according to the embodiment of the present invention.
  • the Circuitry evaluates capacitances of the measuring capacitors 10 'by making each one of the measuring capacitors 10 'by means of switching means 32 with a Signal generating circuit 34 interconnected, so that at one of the Signal generating circuit 34 generated pulse train, the distance of the pulses through the Capacitance of the respective measuring capacitor 10 'is determined.
  • the switching means 32 are such driven to connect the measuring capacitors 10 'in the particular order with the Signal generating circuit 34 connect, so that the measuring capacitors 10 ', which with high probability near the liquid level, first be evaluated.
  • the switching means 32 are designed such that they optionally have a measuring electrode 10a, which together with a counterelectrode 10b forms one of the measuring capacitors 10 ', can connect with the signal generating circuit 34, so that at one of the Signal generating circuit 34 generated pulse train, the distance of the pulses through the Capacitance of the respective measuring capacitor 10 'is determined.
  • the Signal generating circuit 34 preferably a multivibrator circuit.
  • a Processing device 36 processes the individual measuring capacitors 10 ' corresponding pulse trains and generates based on an output signal which corresponds to the level of the container.
  • the processing device 36 includes for it Information regarding the geometry of the container and the positions of the individual Sensor elements 10 and measuring capacitors 10 '.
  • the above embodiment is based on capacitive sensor elements and the Level detection in the fuel tank of a vehicle relates is the invention not limited to this. Rather, the invention may also be advantageous in connection with other types of sensor elements are used, e.g. with resistive Sensor elements in which a dependent of the level change of the electrical resistance is detected.
EP04021138A 2003-10-01 2004-09-06 Procédé de mesure de niveau de remplissage d'un récipient et un dispositif de mesure correspondant Withdrawn EP1521065A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10345707 2003-10-01
DE2003145707 DE10345707A1 (de) 2003-10-01 2003-10-01 Verfahren zur Füllstanderfassung in einem Behälter und entsprechendes Füllstand-Messsystem

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2907896A1 (fr) * 2006-10-26 2008-05-02 Inergy Automotive Systems Res Procede de mesure d'un niveau de liquide dans un reservoir et systeme associe
WO2008049913A1 (fr) * 2006-10-26 2008-05-02 Inergy Automotive Systems Research (Société Anonyme) Procédé permettant de mesurer un niveau de liquide dans un réservoir et système associé
WO2010139974A1 (fr) * 2009-06-03 2010-12-09 Airbus Operations Limited Appareil de mesure de niveau de carburant pour aéronef, et procédé
WO2014005947A1 (fr) * 2012-07-06 2014-01-09 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de détermination d'un niveau de liquide dans un système de production de vapeur d'un appareil de cuisson à la vapeur, appareil de cuisson à la vapeur équipé d'un système de ce type ainsi que procédé de détermination d'un niveau de liquide
EP3034975A1 (fr) * 2014-12-16 2016-06-22 Phoenix Contact GmbH & Co. KG Procede et installation de sechage de granules synthetiques
CN108709604A (zh) * 2018-05-28 2018-10-26 浙江维思无线网络技术有限公司 一种料位检测方法及装置
CN110117890A (zh) * 2018-02-05 2019-08-13 松下家电研究开发（杭州）有限公司 一种液位检测装置、液位检测方法及洗衣机
CN112639415A (zh) * 2018-07-13 2021-04-09 帝肯贸易股份公司 在液体容器中以电容方式检测泡沫的装置和方法

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US4611489A (en) * 1984-01-17 1986-09-16 Shell Oil Company U-shaped capacitor level gauge
FR2662249A1 (fr) * 1990-05-17 1991-11-22 Jaeger Dispositif de mesure de niveau et/ou volume d'un liquide contenu dans un reservoir a sonde capacitive.
US5747689A (en) * 1996-12-09 1998-05-05 Ford Global Technologies, Inc. Fluid level sensing system
US6138508A (en) * 1993-10-27 2000-10-31 Kdi Precision Products, Inc. Digital liquid level sensing apparatus
DE19916979A1 (de) * 1999-04-15 2000-11-02 Sican Gmbh Verfahren zur Füllstandsmessung und Füllstandssensor
US6293145B1 (en) * 1998-04-14 2001-09-25 Mannesmann Vdo Sensor for accurate measurement of levels in irregularly shaped tanks

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JP2000097751A (ja) * 1998-09-21 2000-04-07 Japan Aviation Electronics Industry Ltd 静電容量式液面レベル測定方法およびこの方法を実施する装置
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Publication number Priority date Publication date Assignee Title
US3010320A (en) * 1957-06-18 1961-11-28 Gen Electric Fluid level sensor
US4611489A (en) * 1984-01-17 1986-09-16 Shell Oil Company U-shaped capacitor level gauge
FR2662249A1 (fr) * 1990-05-17 1991-11-22 Jaeger Dispositif de mesure de niveau et/ou volume d'un liquide contenu dans un reservoir a sonde capacitive.
US6138508A (en) * 1993-10-27 2000-10-31 Kdi Precision Products, Inc. Digital liquid level sensing apparatus
US5747689A (en) * 1996-12-09 1998-05-05 Ford Global Technologies, Inc. Fluid level sensing system
US6293145B1 (en) * 1998-04-14 2001-09-25 Mannesmann Vdo Sensor for accurate measurement of levels in irregularly shaped tanks
DE19916979A1 (de) * 1999-04-15 2000-11-02 Sican Gmbh Verfahren zur Füllstandsmessung und Füllstandssensor

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2907896A1 (fr) * 2006-10-26 2008-05-02 Inergy Automotive Systems Res Procede de mesure d'un niveau de liquide dans un reservoir et systeme associe
WO2008049913A1 (fr) * 2006-10-26 2008-05-02 Inergy Automotive Systems Research (Société Anonyme) Procédé permettant de mesurer un niveau de liquide dans un réservoir et système associé
CN101535782B (zh) * 2006-10-26 2012-01-04 因勒纪汽车系统研究公司 用于测量料箱中液面水平的方法以及相关系统
US8181516B2 (en) 2006-10-26 2012-05-22 Inergy Automotive Systems Research (Societe Anonyme) Measuring a liquid level in a tank with two measurement capacitors and two reference capacitors
WO2010139974A1 (fr) * 2009-06-03 2010-12-09 Airbus Operations Limited Appareil de mesure de niveau de carburant pour aéronef, et procédé
US9354099B2 (en) 2009-06-03 2016-05-31 Airbus Operations Limited Aircraft fuel level measurement apparatus and method
CN104411216A (zh) * 2012-07-06 2015-03-11 Bsh博世和西门子家用电器有限公司 用于确定在蒸煮器的蒸汽产生机构中的液位的装置、带有这种装置的蒸煮器以及用于确定液位的方法
WO2014005947A1 (fr) * 2012-07-06 2014-01-09 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de détermination d'un niveau de liquide dans un système de production de vapeur d'un appareil de cuisson à la vapeur, appareil de cuisson à la vapeur équipé d'un système de ce type ainsi que procédé de détermination d'un niveau de liquide
CN104411216B (zh) * 2012-07-06 2017-03-01 Bsh家用电器有限公司 用于确定在蒸煮器的蒸汽产生机构中的液位的装置、带有这种装置的蒸煮器以及用于确定液位的方法
EP3034975A1 (fr) * 2014-12-16 2016-06-22 Phoenix Contact GmbH & Co. KG Procede et installation de sechage de granules synthetiques
CN110117890A (zh) * 2018-02-05 2019-08-13 松下家电研究开发（杭州）有限公司 一种液位检测装置、液位检测方法及洗衣机
CN108709604A (zh) * 2018-05-28 2018-10-26 浙江维思无线网络技术有限公司 一种料位检测方法及装置
CN112639415A (zh) * 2018-07-13 2021-04-09 帝肯贸易股份公司 在液体容器中以电容方式检测泡沫的装置和方法

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